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Fluorocarbon Separation in a Thermally Robust Zirconium Carboxylate Metal–Organic Framework
Author(s) -
Wanigarathna Darshika K. J. A.,
Gao Jiajian,
Liu Bin
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201800337
Subject(s) - fluorocarbon , adsorption , metal organic framework , zirconium , ternary operation , sorption , carboxylate , desorption , materials science , chemical engineering , chemistry , inorganic chemistry , organic chemistry , computer science , engineering , programming language
Fluorocarbons have important applications in industry, but are environmentally unfriendly, and can cause ozone depletion and contribute to the global warming with long atmospheric lifetimes and high global warming potential. In this work, the metal–organic framework UiO‐66(Zr) is demonstrated to have excellent performance characteristics to separate fluorocarbon mixtures at room temperature. Adsorption isotherm measurements of UiO‐66(Zr) display high fluorocarbon sorption uptakes of 5.0 mmol g −1 for R22 (CHClF 2 ), 4.6 mmol g −1 for R125 (CHF 2 CF 3 ), and 2.9 mmol g −1 for R32 (CH 2 F 2 ) at 298 K and 1 bar. Breakthrough data obtained for binary (R22/R32 and R32/R125) and ternary (R32/R125/R134a) mixtures reveal high selectivities and capacities of UiO‐66(Zr) for the separation and recycling of these fluorocarbon mixtures. Furthermore, the UiO‐66(Zr) saturated with R22 and R125 can be regenerated at temperatures as low as 120 °C with excellent desorption–adsorption cycling stabilities.